[Scilab-users] scilab and "parallelization" objectives

[paul.carrico at free.fr]

Hi All 


Maybe my previous email was unclear, but the example hereafter summarizes what I would like to do : 
- here function is launched when the previous is finished ("sequential way"), 
- it is possible to launch them simultaneously? 


Nb : I'm currently on Scilab 5.5.4 and maybe only the latest beta release allows this ? 


If I can do this, then "bingo" 


Thanks 


Paul 
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mode ( 0 ) function status = test ( i , t ) printf ( " function %d is launched\n " , i ) ; sleep ( t * 1000 ) ; printf ( " function %d is endeed\n\n " , i ) ; status = 0 ; endfunction // the duration is expressed in second(s) status = test ( 1 , 1 ) ; status = test ( 2 , 3 ) ; status = test ( 3 , 5 ) ; status = test ( 4 , 7 ) ; 
----- Mail original -----

De: "Paul Carrico" <paul.carrico at esterline.com> 
À: "International users mailing list for Scilab. (users at lists.scilab.org)" <users at lists.scilab.org> 
Envoyé: Jeudi 20 Octobre 2016 15:41:18 
Objet: [Scilab-users] scilab and "parallelization" objectives 



Dear All, 

My internship had an interesting request and I’m not able to answer to him JJ 

The context is the following one: 
- We are using a parallel finite element solver on 4 processors (under Linux), 
- We are performing optimization with an external optimizer, 
- Scilab has been interfaced with both the optimizer and the solver, 
- For the moment, the optimization loops are “basically” performed using the parallelization capabilities of the solvers. 

In practice, Scilab “runs” the solver and “waits” the end of the simulation (always using 4 processors) before calculating the cost function value, giving the later value to the optimizer and then closing. 

Imagine that now we would like to run 4 different simulations each on 1 processor in order to determine the gain (CPU time) … how to proceed ? 

In practice Scilab must be able to : 
- Launch 1rst calculation and to handback … 
- … to launch the 2 nd one … and so on 

We can imagine creating a function per calculation (and I prefer in order to mix stuffs), then running independently but at the same time the different functions. 

Honestly I’ve never done this before and I’m wondering how to proceed … or if it is possible : any feedback on it ? 

Thanks and regards 

Paul 


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